[PATCH RFC v2 13/14] drm/msm: gate lpac behind modparam

[Anna Maniscalco]

Add a mod param to allow initializing and exposing the LPAC ring.

Signed-off-by: Anna Maniscalco <anna.maniscalco2000 at gmail.com>
---
 drivers/gpu/drm/msm/adreno/adreno_device.c | 4 ++++
 drivers/gpu/drm/msm/msm_gpu.c              | 3 ++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/adreno/adreno_device.c b/drivers/gpu/drm/msm/adreno/adreno_device.c
index 6e2333466d7f..51781a2e8a00 100644
--- a/drivers/gpu/drm/msm/adreno/adreno_device.c
+++ b/drivers/gpu/drm/msm/adreno/adreno_device.c
@@ -30,6 +30,10 @@ static bool skip_gpu;
 MODULE_PARM_DESC(no_gpu, "Disable GPU driver register (0=enable GPU driver register (default), 1=skip GPU driver register");
 module_param(skip_gpu, bool, 0400);
 
+int enable_lpac = 0;
+MODULE_PARM_DESC(enable_lpac, "Enable LPAC (A7xx+ only) (1=on , 0=disable, -1=auto (default))");
+module_param(enable_lpac, int, 0600);
+
 extern const struct adreno_gpulist a2xx_gpulist;
 extern const struct adreno_gpulist a3xx_gpulist;
 extern const struct adreno_gpulist a4xx_gpulist;
diff --git a/drivers/gpu/drm/msm/msm_gpu.c b/drivers/gpu/drm/msm/msm_gpu.c
index 4244d9324cda..f6927c797fa5 100644
--- a/drivers/gpu/drm/msm/msm_gpu.c
+++ b/drivers/gpu/drm/msm/msm_gpu.c
@@ -889,6 +889,7 @@ int msm_gpu_init(struct drm_device *drm, struct platform_device *pdev,
 		const char *name, struct msm_gpu_config *config)
 {
 	struct msm_drm_private *priv = drm->dev_private;
+	extern int enable_lpac;
 	int i, ret, nr_rings = config->nr_rings;
 	void *memptrs;
 	uint64_t memptrs_iova;
@@ -1012,7 +1013,7 @@ int msm_gpu_init(struct drm_device *drm, struct platform_device *pdev,
 		memptrs_iova += sizeof(struct msm_rbmemptrs);
 	}
 
-	if (config->has_lpac) {
+	if (config->has_lpac && enable_lpac != 0) {
 		gpu->lpac_rb = msm_ringbuffer_new(gpu, nr_rings, memptrs, memptrs_iova);
 
 		if (IS_ERR(gpu->lpac_rb)) {

-- 
2.56.0